I am not wanting to defend the flaws of the shows, it has plenty. I just don't understand why any showrunner should apologize for his work.

Is Freiberger responsible for the cancellation of TOS because he ran the show during its last year, is Roddenberry responsible for jumping the ship a year before?
I guess so but there were also ample of studio decisions that were more important and I still fail to see why anyone would want anybody to apologize for the cancellation of a show or what they perceive as bad creative work. Some people like me perceive it as good work.

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The illegal we do immediately; the unconstitutional takes a little longer. - former US Secretary of State and unconvicted war criminal Henry Kissinger